Transcode with FFMPEG

Wowza Developer Dojo
1

My application uses rtmp to record video, transcodes the flv video to mp4 using ffmpeg.

Currently, the transcoding happens after the video is recored to flv. I was informed that ffmpeg can take rtmp stream and encode to mp4. This way the processing time can probably greatly shortened as the transcoding starts with the recording.

Currently I put the ffmpeg transcoding command “ffmpeg -i rtmp://localhost:1939/recorder/1333402852509 -acodec libfaac -ac 2 -b:v 200k -ar 48k -async 1 -bufsize 3M -s 320x240 -r 30 -vcodec libx264 -b:a 64k -y 1333402852509.mp4” in the onPublish event of IMediaStreamActionNotify. But no mp4 is written to the disk.

Can someone tell me what’s the correct way to do this?

Thanks!

2

I recommend sticking with the workflow you have. You can start with h.264 video and Speex audio if you use Flash 11 and follow this guide to configure your application:

https://www.wowza.com/docs/how-to-convert-flash-player-11-output-from-h-264-speex-audio-to-h-264-aac-audio-using-wowza-transcoder

Richard